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Hot on the heels of Weistec displaying their M157 turbo upgrade Renntech is releasing their figures. The car in the dynographs below is a 2012 CLS63 AMG with the full Renntech ball-bearing turbo upgrade featuring billet wheels, Renntech filters, Renntech cooling system, and Renntech hi-flow cats / downpipes. The rest of the exhaust is stock and the pulls were done on a dynojet using 93 octane pump gas with no correction factor.

Here are the numbers on the turbo upgrade car versus when it had the performance package:

Here is a dyno comparison between the turbo upgrade, performance package, and standard M157:

Over 225 rear wheel horsepower gain for the turbo upgrade versus the standard car and almost 300 pound-feet of torque at the wheels. Night and day figures.

Keep in mind these numbers come on pump gas and are uncorrected. No doubt people will start comparing the peak figures here the Weistec numbers in SAE correction on 100 octane. Renntech states they intend to keep this stage fairly mild with pump gas world wide in mind and a tune pushing under 20 psi.

You don't guess the correction factor! SAE runs estimate factors based on conditions. It will never deflate or inflate as you state. Here you posted the SAE graph showing less whp. Now please have the run against RPM and show us the real numbers

+63

SAE will certainly neither inflate or deflate at the same time. Its either one or the other. Put that CLS63 on four different runs like the one above and you will find that when switching between SAE and Uncorrected, the Uncorrected graphs will give higher numbers with almost the same exact value. I witnessed this on a same dynojet224 with my friend's TT Supra.

SAE vs Engine RPM with a smoothing set to 5 is the approved method when measuring whp on
a Dynojet 224. Everything else doesn't matter and will show higher power values.

Thats actually not that good of a gain, I managed a 618whp and 802lbs torque with just a EUROCHARGED tune and MBH downpipes kn slip ins on a mustang dyno. My first dyno pull I did a 621whp uncorrected.. 93 octane runs

so with your turbo upgrade and a cost of probably 20k Ill gain 30whp $#@! that

Where to begin...

That's on pump gas first of all.

Secondly, you will gain much more under the curve rather than just straight peak figures which you are looking at.

It's a wheel upgrade essentially. If you want more power you will need to look in this area. Considering upgraded wheels have shown over 700+ wheel already on race gas it's a matter of how much power you want and you are willing to spend.

Personally, I like to win races so if you want to keep your stock turbos go ahead I'd prefer to have modded turbos and smoke you. Just a matter of perspective.

I agree with you believe me! im all about power but I don't like getting robbed.. Renntech is to expensive and I've personally seen a SLR have Renntech headers installed which btw were beautiful quality but it actually made less power than stock!! Sound was amazing but come on man less power

I agree with you believe me! im all about power but I don't like getting robbed.. Renntech is to expensive and I've personally seen a SLR have Renntech headers installed which btw were beautiful quality but it actually made less power than stock!! Sound was amazing but come on man less power

If you have those dyno results I'd love to see them.

Renntech isn't cheap but it's also quality stuff. I mean this is just the beginning. Jumping on them for their pricing when we don't even know the pricing for this upgrade is a bit unfair.

Mind stating why it will never deflate or inflate? Because he's right, it can.

Why do you even bother . Guy has no clue what he's talking about. I'm surprised after all the $#@! he and his brother talk about you and this site, that you are still civil to them after they say they will never post here again...and looks who's back...

Why do you even bother . Guy has no clue what he's talking about. I'm surprised after all the $#@! he and his brother talk about you and this site, that you are still civil to them after they say they will never post here again...and looks who's back...

I try to be civil with everyone and do not hold grudges. So far they are behaving. Ultimately, I want to try to keep the forced induction and performance oriented Mercedes guys together.